On average, listings lease in the $10's per square foot per year. The Murfreesboro region is going through a decrease in rates. In the last 3 months, the median rate fell $9 per sqft per year. That's a 33% decrease in rent.
In the last 90 days, 22 listings have been listed, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,600 sqft. Most properties in this region are close to 2 stories. Most buildings in this market were built in 1998 and are Class A.